Speed changing device



March 26, ,1935.

H. SVENSSON SPEED CHANGING DEVICE Filed Nov. 15, 1933 v s Sheets-Sheet 1 March 26, 1935.

SPEED CHANGING DEV ICE Filed Nov. 15, 1955 3 Sheets-Sheet 2 H. svENssoN. 1,995,333

March 26, 1935. H. SVENSSON 1,995,333

SPEED CHANGING DEVICE Filed Nov. 15, 1933 s sheets-sheet s Patented Mar. 26, 1935 t UNITED STATES PATENT OFFICE 1,995,333 SPEED CHANGING DEVICE Henry Svensson, Gothenburg Province, Sweden, assignor to Monad Corporation, Chicago, Ill., a corporation of Illinois Application November 15, 1933, Serial No. 698,062

7 Claims. (Cl. 74-4300) This invention relates to a speed changing deshoulder upon the drum head 14. It might be vice and concerns itself with a variable motion mentioned that the gear 18 is of the same size as transmitting element and means for balancing the hub of the crank pin 9 and is located dithe same in all of its diiferent positions. ametrically opposite the crank pin hub 8. The

The invention comprises the novel structure counterweight 16 is also diametrically opposite 5 and combinations of parts hereinafter described the axis of the crank pin. Consequently when and more particularly pointed out and defined in the internal gear 14 is rotated in one direction,

the appended claims. 1 the hub 8 of the crank pin 9 and the gear 18 will In the accompanying drawings which illusbe caused to rotate in opposite directions so that trate a preferred form of this invention and in the counterweight 16 will always remain di- 10 which similar reference numerals refer to simametrically opposite the crank pin 9 in any poilar features in the difierent views-z sltion that the crank pin may be rotated by the Figure 1 is a longitudinal sectional view through internal gear 14. In referring to Figure 2, it will a speed changing device or machine embodying be noted that the crank pin 9 is at its maximum this invention. distance from the center of the driving shaft 2. 15

Figure 2 is a sectional view taken upon the line When the hub of the crank pin is rotated by the IIII of Figure 1 looking in the direction of the internal gear on the drum 14, the crank pin will arrows and. showing parts in elevation. move closer to the center of the driving shaft 2 Figure 3 is a sectional view taken upon the line and thus decrease the throw thereof. It mig t IIIIII of' Figure 1 looking in the direction of be mentioned that the crank pin 9 can be rotated 20 the arrows and showing parts in elevation. substantially to the center of the driving shaft so Figure 4 is an enlarged sectional view taken t at t W ll not av y d v adiusupon the line IVIV of Figure 1 looking in the e t a a 14 which y be termed a direction of the arrows and showing parts in eledouble interna a due to t e feet that it as vation. two sets of spaced teeth for operating different 25 Figure 5 is an enlarged sectional view taken elements is carried by a rod 20 whic is Jourupon th li v v of Figure 4 1 i i th 11-- naled within the driving shaft 2. The end of the rection of the arrows. rod 20 is provided with highly sloping ribs 21 In referring to the drawings which illustrate a Which are a e y a ded ve 'W io preferred embodiment of this invention, there is is a apte o be ud a y Shifted through 30 shown a casing 1 provided with itabl bearings the longitudinal movement of a screw element'23. 1a in which the driving shaft 2 is journaled. This It w ll b n ted tha the screw 23 has a head 24 driving shaft may be driven .by any suitable source upon its inner d a d to w c head t ere iS of power such as the motor 3- illustrated within cured a s v 25 hav an nwa dl dir t d. the casing. The forward end of the driving shaft annula fla e 26. The. s w s eeve 22 on the 35 is in the form of an L-shaped flange 4 to which ther ha d has an u wa dly di d a n a pair of plates 5 and 6 are rigidly secured. These flange up n its outer end and a a l arin 8 plates 5 and 6 are provided with an aperture '7 in is p ed between Said w y a outwa dwhich the hub 8 of a crank pin 9 is journaled. turned fla s W th t e esu t t a w en the It will be noted that the aperture and hub 8 are Screw 23 is moved i a ou a d tud na eccentric with respect to the axial center of the direction e Sleeve 22 will be d al y driving shaft 2. The hub of the crank pin is moved in the ame di ection. provided with a rib 10 that travels in a groove 11 In Order to n tud nally move the S ew 3. formed in the plate 6. The inner portion of the there iS P v de a a dw eel 9 which is y d h b 3 of t crank pin is provided t gear upon-a nut 30 which is in threaded relation with teeth 12 that mesh with gear teeth 13 upon the the screw. This handwheel 29 is confined beinner edge of a drum-shaped member 14. Thi tween a sleeve 31 and a nut 32 surrounding the drum-shaped head 14 might be termed an innut 30.- Obviously rotation Of the handwheel 29 ternal gear for rotating the hub 01 the crank will'\cause a rotation of the nut 30 which is faspin 9. tened against longitudinal movement whereby 50 The plate 6 is provided with an inwardly dithe screw 23 will be compelled to move in a longirected boss 15 to which a counterweight 16 is attudinal direction. tached by means of abolt 1'7. A small gear 18 is Reverting now to the crank pin 9, it will be secured to the bolt 17 and this gear 18 is in mesh noted that a ring 33 is joumaled thereon as shown 65 with an internal gear formed upon an annular more clearly in Figures 1 and 4. A plurality of links 34 are pivoted to the ring 33 at their inner ends while the outer ends of the links 34 are pivoted to arms 35 which are integral with clutch casings 36. The clutch casings 36 surround shafts 37. Roller clutch members 38 are interposed between the shafts 3'7 and the housings 36 which are provided with suitable bearing recesses for such a purpose as is well known in the art. In the present instance, there are illustrated six roller clutches for operating a similar number of shafts for successively imparting impulses thereto. The inner ends of the shafts 37 are journaled in an end member of the main casing 1 while the outer ends thereof are journaled in the outer wall of an auxiliary casing lb which is attached to the end of the main casing and forms a chamber therewith. Upon each shaft 3'7 there is keyed a gear 39. It will be noted that certain of the gears 39 are keyed near the outer ends of the shafts 37 while others thereof are keyed a short distance from the outer ends thereof for a purpose that will presently appear. A driven shaft 40 is journaled in the auxiliary casing 1b and has keyed thereon within the casing, a double gear 41 comprising the spaced teeth 41a and 41b. Certain of the gears 39 mesh with one set of teeth 41a while the other gears 39 mesh with the other set of teeth 411). This arrangement produces a good balanced drive with respect to the driven shaft.

The above mentioned ring 33 is designed to travel in a circular path with the crank pin 9, it is however held against rotation upon its own axes by a gimbal joint which is attached to such ring and to the main casing 1.. This gimbal joint comprises a transversely extending rod 42 which is anchored to the main casing 1 as shown in Figure 4. A vertical yoke or ring 43 is slidably mounted upon the rod 42 and this yoke carries a vertical rod 44 upon which the ring 33 is' slidably connected. To this end, it will be noted that the ring 33 has a pair of extending lugs 45 which are apertured and slidably mounted upon the rod 44. With this construction, it will be evident that the crank pin 9 will carry the ring 33 in a circular path while the gimbal joint will allow it to move in such path but prevent independent rotation thereof.

With the foregoing construction, it is possible to adjust the crank pin 9 to coincide with the center of the driving shaft 2 so that no motion will be imparted to the driven shaft 40. However when the crank pin 9 is adjusted so as to produce a radius with respect to the driving shaft 2, the driven shaft 40 will be rotated and as this radius is increased, the rotation of the driven shaft 40 will be increased. As previously set forth, the crank pin 9 is thuswise adjusted by turning the handwheel 29 which causes the sleeve 22 to move longitudinally for rotating the rod 20 and through the aforementioned gearing causing rotatior of the crank .pin 9. Movement of the crank pin 9 in one direction during such ada novel speed changing mechanism has been provided in which an adjustable crank pin is I am aware that many changes may be made I and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

1. In a speed changing device, a driving shaft having a support, a rod mounted in said driving shaft, 2. double internal gear carried by said rod, a crank pin having a hub rotatably mounted in said support, said hub having gear teeth meshing with one of the gears on said double internal gear, a counterweight secured to said support in opposed relation to said crank pin, a gear secured to said counterweight and meshing with the other gear of said double internal gear and means for rotating said rod for simultaneously adjusting said crank pin and counterweight.

2. In a speed changing device, a driving shaft having a drum-like structure upon one end, a crank pin having a hub journaled in the outerwall of said drum and extending into said drum, said hub having gear teeth upon its inner end portion, a counter-weight within said drum-like structure, a stud secured to said counter weight and journaled in the outer wall of said drum-like structure, a gear upon said stud, a rod journaled in said driving shaft, a double internal gear upon the end of said rod for engaging said gear teeth and gear and means for rotating said rod.

3. In a speed changing device, a driving shaft having a support upon one end, a crank pin having a hub journaled in said support in eccentric relation to the center thereof, a counter weight having means journaled in said support upon an axis in spaced relation to the axis of said hub, and means for simultaneously rotating said hub and counter weight for the purpose set forth.

4. In a speed changing device, a driving shaft having a support upon one end, a cylindrical member journaled in said support in offset relation to the center thereof, a crank pin eccentrically mounted upon said cylindrical member, a counter weight having means journaled in said support upon an axis inspaced relation to the axis of said member and means for simultaneously rotating said hub and counter weight in opposite directions.

5. In a speed changing device, a driving shaft having a support upon one end, a cylindrical member rotatably mounted in said support in offset relation to the center thereof, a crank pin upon said cylindrical member in offset relation to the center thereof, a counter weight rotatably mounted on said support upon an axis in spaced relation to the axis of said member and means for simultaneously rotating said counter weight and cylindrical member.

6. In a speed changing device, a driving shaft having a support upon one end, a cylindrical member journaled in said support in eccentric relation to the center thereof, a crank pin upon said member in ofiset relation to the center thereof, a rotatable stud in said support in opposed relation to said member, a counter weight secured upon said stud, a rod'journaled in said shaft, and gearing connecting said rod with said member and stud whereby said member and stud may be simultaneously rotated thru the rotation of said rod, and means for rotating said rod.

'7. In a speed changing device, a driving shaft 10 having a support upon one end, a cylindrical member having a crank pin thereon rotatably ,mounted in said supportin eccentric relation to the center thereof, a counter weight rotatably mounted in said support upon an axis in spaced relation to the axis of said member and, in opposed relation to said member, a rod extending thru said shaft, and. gearing actuated by said rod for simultaneously rotating said member and counter weight.

HENRY SVENSSON. 

